WHY YOU SHOULD LISTEN TO YOUR MAMA:
If you don't, and still dive while having the flu and cough, you'll end up with infected wind-pipe and a relapse that can get you 2 more days of m.c. eating unexciting food and getting bouts of coughing fits that might end up with you throwing your lunch all over the kitchen sink. Especially if she's the one who passed you the virus in the first place.